The 7/8 to 1-3/8" double-fluted step drill bits are faster at cutting and drilling than single flute bits. The thick 3/8" hex shank gives a firm, positive grip and won't spin out in the drill.
The 7/8 to 1-3/8" double-fluted step drill bits are faster at cutting and drilling than single flute bits. The thick 3/8" hex shank gives a firm, positive grip and won't spin out in the drill.